I'm by no means an expert - just a hobbyist tinkering with some RF magic, but I made a simple POC of using SDR to reverse engineer and perform jam and replay at

I'm by no means an expert - just a hobbyist tinkering with some RF magic, but I made a simple POC of using SDR to reverse engineer and perform jam and replay attacks on cars - essentially giving you permanent access (for cars with button keyfobs). I have a short write up here: https://github.com/trishmapow/rf-jam-replay https://github.com/trishmapow/rf-jam-replay